成都市温江区两种绿地土壤抗蚀抗冲性及其影响因素  

Soil Anti-Erosion and Anti-Scouring Effects of Two Types of Urban Green Spaces and Factors Influencing Them in Wenjiang District,Chengdu City

作　　者：史小鹏 苟贺然 何淑勤[1,2,3] 刘柏廷 冉兰芳 杨琪琳 扎西拉姆 陈雨馨 骆紫藤 Shi Xiaopeng;Gou Heran;He Shuqin;Liu Baiting;Ran Lanfang;Yang Qilin;Tashilhamo;Chen Yuxin;Luo Ziteng(College of Forestry,Sichuan Agricultural University,Chengdu,Sichuan 611130,China;National Forestry and Grassland Administration Key Laboratory of Forest Resources Conservation and Ecological Safety on the Upper Reaches of the Yangtze River,Forestry Ecological Engineering in the Upper Reaches of the Yangtze River Key Laboratory of Sichuan Province,Chengdu,Sichuan 611130,China;Key Lab of Soil and Water Conservation and Desertification Combating,Sichuan Agricultural University,Chengdu,Sichuan 611130,China)

机构地区：[1]四川农业大学林学院,四川成都611130 [2]长江上游森林资源保育与生态安全国家林业和草原局重点实验室,长江上游林业生态工程四川省重点实验室,四川成都611130 [3]四川农业大学水土保持与荒漠化防治重点实验室,四川成都611130

出　　处：《水土保持通报》2024年第4期117-125,共9页Bulletin of Soil and Water Conservation

基　　金：国家级大学生创新训练项目“温江区城市林业土壤可蚀性研究”(202210626059);四川省自然科学基金项目(2022NSFSC1037)。

摘　　要：[目的]探究成都市温江区道路绿地和校园绿地土壤抗蚀、抗冲特征及其影响因素,为城市绿地水土保持和生态可持续发展提供理论支持。[方法]采用野外取样与室内试验相结合的方法,对道路和校园绿地中乔木+草地、乔木+灌木、灌木、灌木+草地、草地开展土壤抗蚀抗冲性特征研究。[结果]>5 mm土壤水稳性团聚体含量在道路(79.72%)和校园绿地(39.23%)均表现为最大。土壤总孔隙度、土壤含水量和土壤粉粒含量均表现为:校园绿地>道路绿地(p<0.05)。土壤平均重量直径(MWD),土壤几何平均直径(GMD)、土壤抗蚀性指数、水稳性指数和抗冲指数均表现为:道路绿地>校园绿地(p<0.05),其中乔木+灌木和灌木+草地结构土壤抗蚀抗冲性优于其他植被结构,土壤抗冲系数均随坡度增大而减小。土壤抗蚀、抗冲性指数与>5 mm土壤水稳性团聚体、有机质含量和土壤黏粒均呈极显著正相关;与土壤团聚体破坏率(PAD),不稳定团粒指数(ELT)、<0.25 mm,0.25~2 mm水稳性团聚体呈极显著负相关(p<0.01)。[结论]道路绿地乔木+灌木和灌木+草地结构土壤抗蚀抗冲性最好,校园绿地可以通过调整植被结构增强抗逆性和观赏性,降低土壤侵蚀风险。[Objective] The anti-erosion and anti-scouring characteristics and factors influencing road and campus green spaces in Wenjiang District,Chengdu City were analysed in order o provide functional guidance for urban green space soil and water conservation and promote ecologically sustainable development.[Methods] The soil anti-erosion and anti-scouring properties of arbour + grass,arbour + bush,bush,bush + grass and grass in road and campus green spaces were characterised through field sampling and laboratory tests.[Results] The >5 mm soil water-stable aggregate content was highest in both roads(79.72%) and campus green spaces(39.23%).Total soil porosity,soil water content,and silt content were greater in campus green spaces than road green spaces(p<0.05).Mean weight diameter(MWD),geometric mean diameter(GMD),soil anti-erosion,water stability aggregate index,and anti-scouring were all higher in the road green space than in the campus green space(p<0.05).Specifically,the anti-erosion and anti-scouring of arbour + bush and bush + grass structures were better than that of the other vegetation structures,and the soil anti-scouring coefficient decreased with increasing landscape slope.Soil anti-erosion and-scouring were positively correlated with >5 mm soil water-stable aggregates,organic matter content,and soil clay particles,and negatively correlated with the percentage of aggregate destruction(PAD),unstable aggregate index(ELT) and <0.25 mm and 0.25~2 mm water-stable aggregates(p<0.01).[Conclusion] Arbour + bush and bush + grass had the best soil anti anti-erosion and-scouring effects on road green areas.Campus green space can reduce the risk of soil erosion by adjusting the vegetation structure,thereby enhancing the stress resistance and ornamental property.

关 键 词：城市绿地 理化性质 土壤抗蚀性 土壤抗冲性 植被性状 

分 类 号：S714.7[农业科学—林学] S157